Abuse seems to really have an impact on these people. I'm of the mindset that, if you're not busy, you should respond to the robocalls and just insult and abuse the human that answers until they hang up. If we can collectively drive their job satisfaction down far enough that we increase the turn over rate then, in addition to costing their company money by having to talk to fake leads, we'll be costing them money by having to train more replacements.

Also, depressed workers are slower and less successful in closing deals. We need to damage these businesses as thoroughly as possible.